Peters



WILLIAM O. BE-TITS, OF BROOKLYN, NEW YORK.-

Lettcrs Patent No. 102,478, dated Mey 3, 1870.

VENTILATOR ron wnvnows.

The Schedule'refen'ed to in these Letters Patent and making part of the same. i

-To all whom fit mag] concern:

Be it known thatI, WILLIAM C. BETTs, of Brooklyn, in the county of Kings and State of New York, have invented a new and useful Improvement in Veutilators for Windows, Ste.; and I do vhereby 'declare that the following is a full, clear, and exact description thereof', which will enable others skilled in the art to make and use the same, reference being -had to the accompanying drawingsforming part of this specification, in which l Figure 1,' Sheet I, is a front view of my improved ventilator, part being broken away to show the .construction.

Figure 2, Sheet I, is a top view of thesame.

Figure 3, Sheet Il, is a front view of a modified form of the same.

Figure 4, Sheet Il, is a detail vertical cross-section of fig. 3.l

My invention has for its object to furnish a simple, convenient, and detachable ventilator for attachment to openings in the windows`, doors, or walls of a room, to remove the impure air and introduce 'fresh air in such a way that no injurious currents will be established, and which may be adjusted to adapt it to different conditions of the atmosphere; and f It consists -in the combination with each 'other of two frames, provided with pivote'd slats, whether the .slats of the inner frame be vertical or horizontal, lto

adapt them for insertion in an opening in a window, door, or in thewallor walls of the room to be ventilated, as hereinafter more fully described.

A and B represent the two frames, the dimensions of. which must correspond with the size of the openings in which they are to 'be placed.

In ordinary cases the ventilator is designed to be placed in the upper or lower part of the window, inV openings formed by raising or loweling the =sashes. In this case the twovframes A B should be permanently secured'to each other at a little distance apart by the interposition of lnarrow strips O between the ends of the two names A B, leaving a narrow space vbetween fthe top and bottom bars ofthe said frames,

asshown in fig. 2. The framesA B, in this case, are made of such a length as to t, between the sides of the window-casing, in which vposition they are secured by raising or lowering the. sashl against the outer frame' B, and by means o'f hinged or sliding catches vD,-which enter the sash-grooves, of said'casings.

. In the outer or weather fiameB, the slats b should be horizontal, but the slats a' of the inner frame A may be vertical,'asshown in figs. 1 and 2, or horizontal, as shown vin figs.' 3 and 4.

The former construction I prefer for the ventilator' for the ingress of the air, as it divides up the currents of the entering air better, and enables them to be v thrown laterally in either direction, and thus avoids exposure to the direct and uninterrupted currents of air by parties sitting directly in front of the window.

The latter construction I prefer for they ventilator for the egress of the air, as it enables the inner slats to be adjusted tofacilitate the'v escape of the impure airfrom the room, the slats a' being adjusted into the position shown in lig. 4, when the impure air passes out as it rises; but, should the impure air first rise to the ceiling, and thence pass out through the ventilator, the slats a should be adjusted into the position shown in g. 3't o enable 'the said impure air to pass out more freely.

By reversing the device shown iu fig. 1, (so that the vertical slats shall be on the outside,) it may be used to facilitate the egress of vitated air by turning the slats laterally in accordance with the direction ot' the wind, since the latter will cause a current of air to flow from the room more or less forcibly.

If desired, a pane of glass maybe removed from a window-sash, the frames A B made of such a size as to just cover the square of the sash, from which the glass has been removed, placed one upon the outer and the other upon the inner side of thesash, and-l clamped to each other and to the sash E by clamping v .thumb-screws F, passing through the inner frame A,

and screwing into the outer frame B, said screws passing along the inner sides of the sash-bars E, as shown in figs. 3 and 4.

These ventilators are especially designed for windows, but may be'placed in openings in doors, or in the wall or walls of the room, according to the circumstances of `the case.

For the proper ventilation of the room, at least two ventilators should be used, and they should be placed v upon the opposite sides of the room, and adjusted asthe circumstances of thecase may require. y

Having thus described my invention, I claim as new and desire to secure by Lett'rs Patent- The combination with each other of two parallelyk frames, A B, provided with pivoted slats ab, whether.

the slats of the inner frame bevel-tical or -horizoutah to adapt them for insertion in windows, doors, or in openings in the wallor walls of the room to be venti lated, substantially as herein shown and described, and

for thepurpose set forth.

. WILLIAM G. BETTS.

Witnesses: y

ALEX. F. Bosmans.,l J AMES y T. GRAHAM. 

